MR25H128A
128Kb Serial SPI MRAM
FEATURES
• No write delays
• Unlimited write endurance
• Data retention greater than 20 years
• Automatic data protection on power loss
• Block write protection
• Fast, simple SPI interface with up to 40 MHz clock rate
• 2.7 to 3.6 Volt power supply range
• Low current sleep mode
Small Flag DFN
• Industrial and Automotive temperatures
• Available in 8-pin DFN Small Flag RoHS-compliant package.
• Direct replacement for serial EEPROM, Flash, FeRAM
• Industrial Grade and AEC-Q100 Grade 1 and Grade 3 options
• Moisture Sensitivity MSL-3
INTRODUCTION
The MR25H128A is a 128Kbit magnetoresistive random access memory (MRAM) device orga-
nized as 16,384 words of 8 bits. The MR25H128A offers serial EEPROM and serial
Flash compatible read/write timing with no write delays and unlimited read/write
endurance.
RoHS
Unlike other serial memories, both reads and writes can occur randomly in memo-
ry with no delay between writes. The MR25H128A is the ideal memory solution for applications that must
store and retrieve data and programs quickly using a small number of I/O pins.
The MR25H128A is available in a 5 mm x 6 mm 8-pin DFN Small Flag package compatible with serial EE-
PROM, Flash, and FeRAM products.
The MR25H128A provides highly reliable data storage over a wide range of temperatures. The product is
offered with industrial (-40° to +85 °C) and AEC-Q100 Grade 1 (-40°C to +125 °C) and AEC-Q100 Grade 3
(-40° to +85 °C) operating temperature range options.
CONTENTS
1. DEVICE PIN ASSIGNMENT......................................................................... 3
2. SPI COMMUNICATIONS PROTOCOL...................................................... 4
3. ELECTRICAL SPECIFICATIONS................................................................. 10
4. TIMING SPECIFICATIONS.......................................................................... 14
5. ORDERING INFORMATION....................................................................... 17
6. MECHANICAL DRAWING.......................................................................... 18
7. REVISION HISTORY...................................................................................... 19
How to Reach Us.......................................................................................... 20
MR25H128A Rev. 1.2 3/2018
Copyright © 2018 Everspin Technologies, Inc.
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